-
公开(公告)号：US5747941A
公开(公告)日：1998-05-05
申请号：US568623
申请日：1995-12-07
IPC分类号： H05B41/298 , H05B37/02
CPC分类号： H05B41/2985 , Y10S315/05
摘要： An electronic ballast includes an inverter producing pulses having a DC component, an output circuit connecting the filaments of one or more lamps in series, and a control circuit for detecting direct current through the filaments. The control circuit includes a capacitor charged by the DC component. When the voltage on the capacitor reaches a predetermined value, the ballast applies a high voltage to the lamps. The predetermined value is not reached unless a direct current passes from the output of the inverter through all lamp filaments to the capacitor. If a lamp filament is not intact, the inverter will not apply high voltage to the lamp.
摘要翻译： 电子镇流器包括产生具有DC分量的脉冲的逆变器，串联连接一个或多个灯的灯丝的输出电路和用于检测通过灯丝的直流电的控制电路。 控制电路包括由DC分量充电的电容器。 当电容器上的电压达到预定值时，镇流器对灯施加高电压。 除非直流电流从逆变器的输出通过所有灯丝到电容器，否则不能达到预定值。 如果灯丝不完整，变频器将不会对灯施加高电压。
-
公开(公告)号：US5539281A
公开(公告)日：1996-07-23
申请号：US376774
申请日：1995-01-23
IPC分类号： H05B41/282 , H02M3/155 , H02M7/217 , H05B41/285 , H05B41/392 , H05B37/02
CPC分类号： H05B41/2853 , H05B41/3925 , Y10S315/04 , Y10S315/07
摘要： An electronic ballast includes a converter coupled to a variable frequency inverter and a series resonant, parallel loaded output coupled to the inverter. The frequency of the inverter increases when the supply voltage from the converter decreases. The converter includes a full wave rectifier producing a first voltage and an unregulated boost circuit producing a second voltage which is combined with the first voltage to produce the supply voltage. The amount of boost, and therefore the magnitude of the supply voltage, is varied to provide dimming. Dimming is controlled mechanically, via a potentiometer, or electrically, via a control input. Dimming also occurs in response to changes in the first voltage, i.e. from changes in the voltage on an AC power line or from changes in the voltage provided by a capacitive dimmer coupled between the ballast and an AC power line.
摘要翻译： 电子镇流器包括耦合到可变频逆变器的转换器和耦合到逆变器的串联谐振并联负载输出。 当变频器的电源电压降低时，变频器的频率增加。 该转换器包括产生第一电压的全波整流器和产生与第一电压组合以产生电源电压的第二电压的未调节升压电路。 升高量以及因此的电源电压的大小被改变以提供调光。 调光通过电位计机械地或通过控制输入进行电气控制。 响应于第一电压的变化，即由交流电源线上的电压的变化或者由耦合在镇流器和交流电源线之间的电容调光器提供的电压的变化也发生调光。
-
公开(公告)号：US5500576A
公开(公告)日：1996-03-19
申请号：US227953
申请日：1994-04-15
CPC分类号： G05F1/70 , H02M1/4225 , H05B41/28 , Y02B70/126 , Y10S315/05
摘要： An electronic ballast has a high voltage portion and a low voltage portion. The high voltage portion includes a converter, having a variable frequency boost circuit, and a half-bridge, driven inverter having a series resonant, direct coupled output. The low voltage portion of the ballast includes a control circuit and fault detectors for shutting off the boost circuit and the inverter circuit. The fault detectors consume very little power when the ballast and lamp are functioning normally. Separate magnetics are used for boost, inverter, and output. Each magnetic is essentially cubic in shape and carries as little current as possible.
摘要翻译： 电子镇流器具有高电压部分和低电压部分。 高电压部分包括具有可变频率升压电路的转换器和具有串联谐振直接耦合输出的半桥驱动逆变器。 镇流器的低电压部分包括控制电路和用于关断升压电路和逆变器电路的故障检测器。 当镇流器和灯正常工作时，故障检测器消耗的功率很小。 单独的磁力线用于升压，逆变和输出。 每个磁体的形状基本上是立方体，并且尽可能少地传输电流。
-
公开(公告)号：US5396155A
公开(公告)日：1995-03-07
申请号：US266746
申请日：1994-06-28
IPC分类号： H05B41/285 , H05B41/392 , G05F1/00
CPC分类号： H05B41/2853 , H05B41/3925 , Y02B20/185 , Y10S315/04 , Y10S315/07
摘要： A self-dimming electronic ballast for a gas discharge lamp includes a converter having an unregulated boost circuit coupled to a variable frequency inverter having a series resonant, parallel loaded output. The inverter includes a variable frequency driver circuit having a timing circuit for determining the frequency of the driver. A transistor in the timing circuit operates as an inverting amplifer and is controlled by a signal proportional to the voltage of the AC line. The frequency of the inverter increases with decreasing voltage on the AC line. The ballast can be on the same circuit as incandescent lamps and powered by a triac or variac dimmer for dimming both the incandescent and gas discharge lamps.
摘要翻译： 用于气体放电灯的自调光电子镇流器包括具有耦合到具有串联谐振并联负载输出的变频器的未调节升压电路的转换器。 逆变器包括具有用于确定驾驶员的频率的定时电路的可变频率驱动器电路。 定时电路中的晶体管作为反相放大器工作，并由与AC线的电压成比例的信号控制。 变频器的频率随着交流线路上的电压降低而增加。 镇流器可以与白炽灯在同一电路上，并且由三端双向可控硅开关元件或可变调光器供电，用于对白炽灯和气体放电灯进行调光。
-
公开(公告)号：US5493180A
公开(公告)日：1996-02-20
申请号：US416022
申请日：1995-03-31
IPC分类号： H05B41/24 , H05B41/298 , H05B39/10
CPC分类号： H05B41/2985
摘要： A lamp protective, electronic ballast includes a lamp voltage detector having a capacitor and resistor series connected across a discharge lamp. The junction of the resistor and capacitor is coupled to a voltage sensitive switch for detecting DC offset on the lamp and excessive AC voltage on the lamp. The switch is more sensitive to DC offset than to excessive AC voltage and is disabled while the lamp is started.
摘要翻译： 灯保护电子镇流器包括具有连接在放电灯上的电容器和电阻器串联的灯电压检测器。 电阻器和电容器的结点耦合到电压敏感开关，用于检测灯上的直流偏移和灯上的过大的交流电压。 开关比直流偏移比过大的交流电压更敏感，在启动灯时禁用。
-
6.发明授权Booster driven inverter ballast employing the output from the inverter to trigger the booster 失效增压器驱动的逆变器镇流器采用变频器的输出来触发升压器
公开(公告)号：US5461287A
公开(公告)日：1995-10-24
申请号：US202053
申请日：1994-02-25
IPC分类号： H05B41/298 , H05B37/02
CPC分类号： H05B41/2985 , Y10S315/05 , Y10S315/07
摘要： An electronic ballast includes a triggered boost circuit, a driven inverter, and a low voltage signal generator in a a half-bridge, push-pull, series resonant, parallel loaded configuration. The boost circuit is triggered by a voltage from the inverter and the inverter is controlled by the low voltage signal generator. The boost circuit includes a low voltage output for powering the signal generator. In the event of a fault, the operation of the signal generator is interrupted, thereby shutting off the boost circuit and the inverter. A DC blocking capacitor is in series with the lamps and a resistor is connected in parallel with the DC blocking capacitor. The ballast is started by a pulse of displacement current through the lamp filaments to the boost circuit. Since the lamp filaments must be intact, the ballast does not begin a lamp starting sequence until lamps are connected to the ballast.
摘要翻译： 电子镇流器包括触发升压电路，从动逆变器和半桥式推挽串联谐振并联负载配置中的低电压信号发生器。 升压电路由变频器的电压触发，变频器由低压信号发生器控制。 升压电路包括用于为信号发生器供电的低电压输出。 发生故障时，信号发生器的运行中断，从而关闭升压电路和逆变器。 直流隔离电容器与灯串联，并且电阻器与隔直流电容器并联连接。 镇流器通过灯丝的位移电流脉冲启动到升压电路。 由于灯丝必须是完整的，所以镇流器不会开始灯起动顺序，直到灯泡连接到镇流器。
-
公开(公告)号：US5493181A
公开(公告)日：1996-02-20
申请号：US436789
申请日：1995-05-08
IPC分类号： H05B41/285 , H05B39/00
CPC分类号： H05B41/2855 , Y10S315/07
摘要： An electronic ballast includes a boost circuit, a low voltage control circuit, and a driven inverter in a half-bridge, push-pull, series resonant, parallel loaded configuration. The boost circuit includes a low voltage output for powering the control circuit. In the event of a fault, the control circuit shuts off the boost circuit and the inverter. A sense capacitor is in series with the lamps and the voltage across the capacitor prevents a timer in the control circuit from shutting off the ballast. The timer circuit waits a period longer than the time it takes for the lamps to start normally. The sense capacitor is either in series with the lamp across the resonant capacitor or is in series with the resonant capacitor.
摘要翻译： 电子镇流器包括升压电路，低压控制电路和半桥，推挽，串联谐振，并联负载配置中的从动逆变器。 升压电路包括用于为控制电路供电的低电压输出。 发生故障时，控制电路将关闭升压电路和逆变器。 感测电容器与灯串联，并且电容器两端的电压防止控制电路中的定时器关闭镇流器。 定时器电路等待一段比灯正常启动所需的时间更长的时间。 感测电容器与谐振电容器上的灯串串联或与谐振电容器串联。
-
公开(公告)号：US5440475A
公开(公告)日：1995-08-08
申请号：US148295
申请日：1993-11-08
申请人： Randy G. Russell , Kent E. Crouse
发明人： Randy G. Russell , Kent E. Crouse
IPC分类号： H05B41/282 , G05F1/70 , H02M1/00 , H02M1/42 , H02M3/155 , H02M7/217 , H05B41/28 , H02M1/12 , H05B37/02
CPC分类号： H02M1/4225 , G05F1/70 , H05B41/28 , Y02B70/126
摘要： Power factor is increased and harmonic distortion is decreased in a boost circuit by varying the current drawn in phase with the ripple voltage from a rectifying bridge. The boost circuit includes a series connected inductor and switching transistor and the control electrode of the switching transistor is connected to a second inductor. The second inductor is magnetically coupled to the first inductor and provides feedback for sustaining high frequency oscillations in the boost circuit. A third inductor is magnetically coupled to the first and second inductors and to the control electrode of the switching transistor. The voltage from the third inductor is rectified and filtered to remove the high frequency pulses but not the ripple and the voltage is coupled to the control electrode of the switching transistor for changing the power consumed by said boost circuit in phase with the ripple.
摘要翻译： 通过改变与整流桥的纹波电压相位相同的电流，升压电路中的功率因数增加，谐波失真减小。 升压电路包括串联的电感器和开关晶体管，并且开关晶体管的控制电极连接到第二电感器。 第二电感器磁耦合到第一电感器并提供用于在升压电路中维持高频振荡的反馈。 第三电感器磁耦合到第一和第二电感器以及开关晶体管的控制电极。 来自第三电感器的电压被整流和滤波以去除高频脉冲而不是纹波，并且电压耦合到开关晶体管的控制电极，用于与波纹相同地改变由所述升压电路消耗的功率。
-
公开(公告)号：US4415873A
公开(公告)日：1983-11-15
申请号：US364292
申请日：1982-04-01
申请人： Jack C. Thornton , Randy G. Russell
发明人： Jack C. Thornton , Randy G. Russell
IPC分类号： H01F29/06
CPC分类号： H01F29/06
摘要： A variable inductance includes a coil and a moveable contactor which maintains continuous contact with the coil. An electrical connection, which is moveable along with the moveable contactor and away from a first end of the coil, connects the moveable contactor with further contact means positioned remote from the first end of the coil.
摘要翻译： 可变电感包括线圈和与线圈保持连续接触的可动接触器。 与可动接触器一起移动并远离线圈的第一端的电连接将可移动的接触器与远离线圈的第一端定位的另外的接触装置连接。
-
公开(公告)号：US4581690A
公开(公告)日：1986-04-08
申请号：US589965
申请日：1984-03-15
申请人： Randy G. Russell
发明人： Randy G. Russell
CPC分类号： H02M3/33561
摘要： A switched-mode power supply provides a plurality of directly regulated DC output voltages. The power supply includes a first inverter-coupled transformer for providing first and second DC output voltages, with a feedback loop provided from a first output to the inverter for regulating the first DC output voltage. A second transformer is coupled across the first and second output lines of the first transformer and is further coupled across the second output lines by means of a switching regulator circuit including a second feedback loop for regulating the second DC output voltage. By proper selection of the number of turns of the second transformer, the regulator is capable of either substantially increasing the second output voltage when the switching device is on while lowering the output voltage very little when the switching device is off, or increasing the second output voltage very little with the switching device on while substantially lowering the output voltage when the switching device is off. This permits the use of a large turns ratio in the second transformer in combination with smaller diodes and transistors which carry current equal to the output current divided by the second transformer's turns ratio. Reduced output current provides more efficient power supply operation, while the use of smaller semiconductors reduces power supply cost.
摘要翻译： 开关型电源提供多个直接调节的DC输出电压。 电源包括用于提供第一和第二DC输出电压的第一反相器耦合变压器，以及从第一输出到逆变器提供的用于调节第一DC输出电压的反馈环路。 第二变压器耦合在第一变压器的第一和第二输出线之间，并通过包括用于调节第二直流输出电压的第二反馈回路的开关调节器电路进一步耦合在第二输出线上。 通过适当选择第二变压器的匝数，当开关装置接通时，调节器能够大大增加第二输出电压，同时当开关装置关闭时，输出电压降低很小，或增加第二输出 当开关装置关闭时，开关装置的电压非常小，同时显着降低输出电压。 这允许在第二变压器中使用较大的匝数比与较小的二极管和晶体管结合，这些二极管和晶体管的电流等于输出电流除以第二变压器的匝数比。 降低输出电流提供更高效的电源操作，而使用较小的半导体可以降低电源成本。
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.02 秒)
